EP2718395A1 - Nouveau convertisseur de couleurs - Google Patents

Nouveau convertisseur de couleurs

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Publication number
EP2718395A1
EP2718395A1 EP12726790.4A EP12726790A EP2718395A1 EP 2718395 A1 EP2718395 A1 EP 2718395A1 EP 12726790 A EP12726790 A EP 12726790A EP 2718395 A1 EP2718395 A1 EP 2718395A1
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EP
European Patent Office
Prior art keywords
mono
polysubstituted
alkyl
aryl
moieties
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Granted
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EP12726790.4A
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German (de)
English (en)
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EP2718395B1 (fr
Inventor
Martin KÖNEMANN
Gerhard Wagenblast
Robert SEND
Sorin Ivanovici
Gerardus De Keyzer
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BASF SE
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BASF SE
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502—Wavelength conversion materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B57/00—Other synthetic dyes of known constitution
    • C09B57/06—Naphtholactam dyes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/10—Non-macromolecular compounds
    • C09K2211/1003—Carbocyclic compounds
    • C09K2211/1007—Non-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/10—Non-macromolecular compounds
    • C09K2211/1003—Carbocyclic compounds
    • C09K2211/1011—Condensed systems
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/10—Non-macromolecular compounds
    • C09K2211/1018—Heterocyclic compounds
    • C09K2211/1025—Heterocyclic compounds characterised by ligands
    • C09K2211/1044—Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention provides color converters comprising at least one polymer as a matrix material and at least one organic fluorescent dye comprising at least one structural unit of the formula (I)
  • the structural unit may be mono- or polysubstituted by identical or different substituents and where one or more CH groups of the six-membered ring of the benzimidazole structure shown may be replaced by nitrogen, and processes for production thereof.
  • the invention further provides illumination devices comprising at least one LED and at least one color converter comprising at least one polymer as a matrix material and at least one organic fluorescent dye comprising at least one structural unit of the formula (I)
  • the invention further provides polymer mixtures comprising suitable fluorescent dyes.
  • the invention further provides novel organic fluorescent dyes.
  • Lighting equipment is the subject of further technical development with regard to the energy efficiency, color reproduction, service life, manufacturing costs and usability thereof.
  • Incandescent lamps and halogen lamps being thermal radiators, produce light with very good color reproduction since a broad spectrum is emitted with radiation characteristics approaching Planck's law of black body radiation and closely resembling sunlight.
  • One disadvantage of incandescent lamps is the high power consumption thereof, since a very large amount of electrical energy is converted to heat.
  • a higher efficiency is possessed by compact fluorescent tubes, which produce a linear emission spectrum of mercury by discharge of an electrically excited mercury vapour.
  • compact fluorescent tubes On the inside of these compact fluorescent tubes are phosphors comprising rare earths, which absorb some of the mercury emission spectrum and emit it as green and red light.
  • the emission spectrum of a compact fluorescent tube is composed of different lines, which results in much poorer color reproduction.
  • the light of a compact fluorescent tube is found by many humans to be less natural and less pleasant than sunlight or light from incandescent lamps.
  • LEDs light-emitting diodes
  • the light emission is based on the recombination of electron-hole pairs (excitons) in the junction area of a forward-biased semiconductor pn junction.
  • the size of the band gap of this semiconductor determines the approximate wavelength. LEDs can be produced in different colors.
  • Stable and energy-efficient blue LEDs can produce white light by color conversion.
  • a polymeric material comprising a radiation conversion phosphor is applied directly to the LED light source (LED chip).
  • the polymeric material is applied to the LED chip in approximately droplet or hemispherical form, as a result of which particular optical effects contribute to the emission of light.
  • Such structures in which radiation conversion phosphor in a polymeric matrix is applied directly and without intervening space to an LED chip are also referred to as "phosphor on a chip".
  • the radiation conversion phosphors used are generally inorganic materials.
  • the radiation conversion phosphors which may consist, for example, of cerium-doped yttrium aluminium garnet, absorb a certain proportion of the blue light and emit longer-wave light with a broad emission band, such that the mixing of the transmitted blue light and of the emitted light gives rise to white light.
  • the polymeric material and the radiation conversion phosphor also referred to as fluorescent colorant or fluorescent dye
  • organic radiation conversion phosphors have not been suitable to date for use in phosphor on a chip LEDs.
  • the color converter also referred to as “converter” or “light converter”
  • the color converter which generally comprises a carrier and a polymer layer, is at a certain distance from the LED chip.
  • Such a structure is referred to as "remote phosphor”.
  • the spatial distance between the primary light source, the LED, and the color converter reduces the stress resulting from heat and radiation to such an extent that the requirements on the stability can be achieved by suitable organic fluorescent dyes.
  • LEDs according to the "remote phosphor" concept are even more energy-efficient than those according to the "phosphor on a chip” concept.
  • the use of organic fluorescent dyes in these converters offers various advantages. They enable good color reproduction and are capable of producing pleasant light. Furthermore, they do not require any materials comprising rare earths, which have to be mined and provided in a costly and inconvenient manner and are only available to a limited degree. It is therefore desirable to provide color converters for LEDs which comprise suitable organic fluorescent dyes.
  • WO 03/038915 A US 20080252198 describe the use of perylene dyes as radiation conversion phosphors for phosphor on a chip LEDs.
  • JP 2001 -240733 A discloses the use of substituted naphthalenebenzimidazoles for coloring polybutylene terephthalate in order to obtain a hue of maximum blackness.
  • the object was achieved by the color converters, illumination devices, polymer mixtures and organic fluorescent dyes specified at the outset.
  • Color converters in the context of this invention are understood to mean all physical devices which are capable of absorbing light of particular wavelengths and converting it to light of other wavelengths.
  • Color converters are, for example, part of illumination devices, especially those illumination devices which utilize LEDs or OLEDs as a light source, or of fluorescence conversion solar cells.
  • organic fluorescent dye comprising at least one structural unit of the formula (I) refers to an organic fluorescent dye which consists of one structural unit of the formula (I) or comprises one or more, e.g. 2, 3, 4 or more than 4 structural unit of the formula I. If the organic fluorescent dye consists of one structural unit of the formula (I), the organic fluorescent dye is synonymous with the structural unit of the formula (I).
  • organic moieties mentioned in the above definitions of the variables are - like the term halogen - collective terms for individual listings of the individual group members.
  • the prefix Cn-Cm indicates in each case the possible number of carbon atoms in the group.
  • halogen denotes in each case fluorine, bromine, chlorine or iodine.
  • aliphatic radical refers to an acyclic saturated or unsaturated, straight-chain or branched hydrocarbon radical. Usually the aliphatic radical has 1 to 100 carbon atoms.
  • Examples for an aliphatic radical are alkyl, alkenyl and alkynyl.
  • cycloaliphatic radical refers to a cyclic, non-aromatic saturated or unsaturated hydrocarbon radical having usually 3 to 20 ring carbon atoms. Examples are cycloalkanes, cycloalkenes, and cycloalkynes. The cycloaliphatic radical may also heteroatoms or heteroatom groups.
  • alkyl as used herein and in the alkyl moieties of alkoxy, alkylthio, alkylsulfinyl, alkylsulfonyl, alkylcarbonyl, alkoxycarbonyl and the like refers to saturated straight-chain or branched hydrocarbon radicals having 1 to 100 (“Ci-Cioo-alkyl”), 1 to 30 (“Ci-C 30 -alkyl”),1 to 18 (“Ci-Ci8-alkyl”), 1 to 12 (“Ci-Ci 2 -alkyl”), 1 to 8 (“Ci-C 8 -alkyl”) or 1 to 16 (“Ci-C 6 -alkyl”) carbon atoms.
  • alkenyl refers to straight-chain or branched hydrocarbon groups having 2 to 100 (“C 2 -Cioo-alkenyl"), 2 to 18 (“C 2 -Ci 8 -alkenyl"), 2 to 10 (“C 2 -Cio-alkenyl”), 2 to 8 (“C 2 -C 8 - alkenyl”), or 2 to 6 (“C 2 -C6-alkenyl”) carbon atoms and one or more, e.g. 2 or 3, double bonds in any position.
  • alkynyl refers to straight-chain or branched hydrocarbon groups having 2 to 100 (“C 2 -Cioo-alkynyl"), 2 to 18 (“C 2 -Ci 8 -alknyl”), 2 to 10 (“C 2 -Cio-alkynyl”), 2 to 8 (“C 2 -C 8 - alkynyl”), or 2 to 6 (“C 2 -C6-alkynyl”) carbon atoms and one or more, e.g. 2 or 3, triple bonds in any position.
  • cycloalkyl refers to mono- or bi- or polycyclic saturated hydrocarbon radicals having 3 to 20 (“C3-C2o-cycloalkyl”) atoms, preferably 3 to 8 (“Cs-Cs-cycloalkyl”) or 3 to 6 carbon atoms (“C3-C6-cycloalkyl”).
  • monocyclic radicals having 3 to 6 carbon atoms comprise cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl.
  • Examples of monocyclic radicals having 3 to 8 carbon atoms comprise cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl.
  • Examples of bicyclic radicals having 7 or 8 carbon atoms comprise bicyclo[2.2.1]heptyl, bicyclo[3.1.1 ]heptyl, bicyclo[2.2.2]octyl and bicyclo[3.2.1]octyl.
  • a cycloalkyl ring, wherein the cycloalkylring may contain heteroatoms or heteroatom groups is also referred to as heterocyclic ring.
  • the heterocyclic ring usually contains besides carbon atoms as ring members 1 , 2, 3 or 4 heteroatoms selected from O, S and N as ring members.
  • aryl refers to a mono-, or polycyclic, e.g. bi- , tri-, tetra- or pentacyclic, aromatic hydrocarbon radical having 6 to 22, preferably 6 to 10, 6 to 13, 6 to 14, 6 to 16, 6 to 18, 6 to 20 or 6 to 22 carbon atoms as ring members.
  • alkaryl refers to aryl as defined above substituted by at least one alkyl group as defined above. Alkaryl groups may, depending on the size of the aromatic ring system, have one or more (e.g. 1 , 2, 3, 4, 5, 6, 7, 8, 9 or more than 9) alkyl substituents.
  • aralkyl refers to alkyl as defined above substituted by at least one aryl group as defined above.
  • Aralkyl groups may, depending on the size of the aromatic ring system, have one or more (e.g. 1 , 2, 3, 4, 5, 6, 7, 8, 9 or more than 9) aryl substituents.
  • heteroaryl refers to a mono- or polycyclic, e.g. bi-, or tricyclic, heteroaromatic hydrocarbon radical, preferably to a monocyclic or bicyclic heteroaromatic radical.
  • Hetaryl usually is a 5-, 6-, 7-, 8-, 9-, 10-, 1 1 -, 12-, 13-, 14- or 15-memberd cyclic radical having besides carbon atoms as ring members 1 , 2, 3 or 4 heteroatoms selected from O, S and N as ring members.
  • aryl or hetaryl to each of which may be fused further saturated or unsaturated 5- to 7-membered rings whose carbon skeleton may comprise one or more -0-, -S-, -CO- and/or -SO2- moieties
  • Inventive color converters comprise at least one polymer and at least one organic fluorescent dye comprising at least one structural unit of the formula (I)
  • structural unit may be mono- or polysubstituted by identical or different substituents and.
  • Examples for structural units of the formula (I) where one or more CH groups of the six- membered ring of the benzimidazole structure are replaced by nitrogen are structural units of the formula ( ⁇ ),
  • Suitable polymers are in principle all polymers which are capable of dissolving or of homogeneously distributing the at least one organic fluorescent dye in a sufficient amount.
  • Suitable polymers may be inorganic polymers or organic polymers.
  • Suitable inorganic polymers are, for example, silicates or silicon dioxide.
  • a prerequisite for the use of inorganic polymers is that the at least one organic fluorescent dye can be dissolved or homogeneously distributed therein without decomposition. In the case of silicates or silicon dioxide, this can be accomplished, for example, by deposition of the polymer from a waterglass solution.
  • Suitable organic polymers are, for example, polystyrene, polycarbonate, polymethyl methacrylate, polyvinylpyrrolidone, polymethacrylate, polyvinyl acetate, polyvinyl chloride, polybutene, polyethylene glycol, silicone, polyacrylate, epoxy resin, polyvinyl alcohol, polyacrylonitrile, polvinylidene chloride (PVDC), polystyrene-acrylonitrile (SAN), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyvinyl butyrate (PVB), polyvinyl chloride (PVC), polyamides, polyoxymethylenes, polyimides, polyether imide or mixtures thereof.
  • the at least one organic polymer consists essentially of polystyrene, polycarbonate, polymethyl methacrylate, polyvinylpyrrolidone, polymethacrylate, polyvinyl acetate, polyvinyl chloride, polybutene, polyethylene glycol, silicone, polyacrylate, epoxy resin, polyvinyl alcohol, polyacrylonitrile, polvinylidene chloride (PVDC), polystyrene- acrylonitrile (SAN), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyvinyl butyrate (PVB), polyvinyl chloride (PVC), polyamides, polyoxymethylenes, polyimides, polyether imide or mixtures thereof.
  • the at least one polymer consists essentially of polystyrene, polycarbonate, polymethyl methacrylate or mixtures thereof.
  • the at least one polymer consists essentially of polystyrene or polycarbonate.
  • Polystyrene is understood here to include all homo- or copolymers which result from
  • styrene polymerization of styrene and/or derivatives of styrene.
  • Derivatives of styrene are, for example, alkylstyrenes such as alpha-methylstyrene, ortho-, meta-, para-methylstyrene, para- butylstyrene, especially para-tert-butylstyrene, alkoxystyrene such as para-methoxystyrene, para-butoxystyrene, para-tert-butoxystyrene.
  • suitable polystyrenes have a mean molar mass M n of 10 000 to 1 000 000 g/mol (determined by GPC), preferably 20 000 to 750 000 g/mol, more preferably 30 000 to
  • the matrix of the color converter consists essentially or completely of a homopolymer of styrene or styrene derivatives.
  • the matrix consists essentially or completely of a styrene copolymer which is likewise considered to be a polystyrene in the context of this application.
  • Styrene copolymers may comprise, as further constituents, for example, butadiene, acrylonitrile, maleic anhydride, vinylcarbazole, or esters of acrylic acid, methacrylic acid or itaconic acid, as monomers.
  • Suitable styrene copolymers comprise generally at least 20% by weight of styrene, preferably at least 40% and more preferably at least 60% by weight of styrene. In another embodiment, they comprise at least 90% by weight of styrene.
  • Preferred styrene copolymers are styrene-acrylonitrile copolymers (SAN) and acrylonitrile-butadiene- styrene copolymers (ABS), styrene-1 ,1 '-diphenylethene copolymers, acrylic ester-styrene- acrylonitrile copolymers (ASA), methyl methacrylate-acrylonitrile-butadiene-styrene copolymers (MABS).
  • a further preferred polymer is alpha-methylstyrene-acrylonitrile copolymer (AMSAN).
  • the styrene homo- or copolymers can be prepared, for example, by free-radical polymerization, cationic polymerization, anionic polymerization, or under the influence of organometallic catalysts (for example Ziegler-Natta catalysis). This can lead to isotactic, syndiotactic, atactic polystyrene or copolymers. They are preferably prepared by free-radical polymerization.
  • the polymerization can be performed as a suspension polymerization, emulsion polymerization, solution polymerization or bulk polymerization.
  • suitable polystyrenes is described, for example, in Oscar Nuyken,
  • Polystyrenes and Other Aromatic Polyvinyl Compounds in Kricheldorf, Nuyken, Swift, New York 2005, p. 73-150 and literature cited therein; and in Elias, Macromolecules, Weinheim 2007, p. 269-275.
  • Polycarbonates are polyesters of carbonic acid with aromatic or aliphatic dihydroxyl
  • Preferred dihydroxyl compounds are, for example, methylenediphenyldihydroxyl compounds, for example bisphenol A.
  • polycarbonates One means of preparing polycarbonates is the reaction of suitable dihydroxyl compounds with phosgene in an interfacial polymerization. Another means is the reaction with diesters of carbonic acid, such as diphenyl carbonate, in a condensation polymerization.
  • polymers which have been polymerized with exclusion of oxygen are used.
  • the monomers preferably comprised, during the polymerization, a total of at most 1000 ppm of oxygen, more preferably at most 100 ppm and especially preferably at most 10 ppm.
  • Suitable polymers may comprise, as further constituents, additives such as flame retardants, antioxidants, light stabilizers, UV absorbers, free-radical scavengers, antistats.
  • additives such as flame retardants, antioxidants, light stabilizers, UV absorbers, free-radical scavengers, antistats.
  • Suitable antioxidants or free-radical scavengers are, for example, phenols, especially sterically hindered phenols such as butylhydroxyanisole (BHA) or butylhydroxytoluene (BHT), or sterically hindered amines (HALS).
  • BHA butylhydroxyanisole
  • BHT butylhydroxytoluene
  • HALS sterically hindered amines
  • antioxidants and free-radical scavengers can be supplemented by secondary stabilizers such as phosphites or phosphonates, as sold, for example, by BASF under the Irgafos ®
  • Suitable UV absorbers are, for example, benzotriazoles such as 2-(2-hydroxyphenyl)-2H- benzotriazoles (BTZ), triazines such as (2-hydroxyphenyl)-s-triazines (HPT),
  • UV absorbers are sold, for example by BASF under the Uvinul ® trade name.
  • suitable polymers do not comprise any antioxidants or free-radical scavengers.
  • suitable polymers are transparent polymers.
  • suitable polymers are opaque polymers.
  • the polymers mentioned serve as matrix material for suitable organic fluorescent dyes.
  • organic fluorescent dyes for use in color converters are those which comprise at least one structural unit of the formula (I)
  • the structural unit may be mono- or polysubstituted by identical or different substituents and where one or more CH groups of the six-membered ring of the benzimidazole structure shown may be replaced by nitrogen.
  • suitable organic fluorescent dyes comprise at least one structural unit (II)
  • n is a number from 0 to (10-p) for each structural unit of the formula (II); where p is the number of CH units which have been replaced by nitrogen in the six-membered ring of the benzimidazole structure shown;
  • X is a chemical bond, O, S, SO, SO2, NR 1 ;
  • R is an aliphatic radical, cycloaliphatic radical, aryl, hetaryl, each of which may bear any desired substituents,
  • X and R when n > one, may be the same or different;
  • R 1 is each independently hydrogen, Ci-Cis-alkyl or cycloalkyl, the carbon chain of which may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted;
  • aryl or hetaryl which may be mono- or polysubstituted.
  • Bromine is less preferred as an R radical since it weakens the fluorescence.
  • the two radical R together with the atoms to which they are bonded may form a fused ring system having one or more, e.g. 1 , 2, 3, 4 or more than 4, rings.
  • the fused ring system may be saturated or partially unsaturated.
  • the fused ring system may comprise besides carbon atoms as ring members one or more heteroatoms or heteroatomic groups selected from CO, SO, O, S and N as ring members. Examples for structural units of the formula (II) where one or more CH groups of the six- membered ring of the benzimidazole structure are replaced by nitrogen are structural units of the formula ( ⁇ ),
  • up to two CH groups of the six-membered ring of the benzimidazole group ("of the benzimidazole ring") of the structural unit (II) are replaced by nitrogen atoms.
  • two variables D 1 to D 4 are N and the other variables D 1 to D 4 are CH.
  • the maximum value for n is reduced by the number of nitrogen atoms which replace a CH group.
  • the maximum possible number of (X-R) radicals in the structural unit (II) is no longer 10 but rather eight.
  • n remain unaffected by the number of nitrogen atoms in the structural unit (II), provided that the preferred upper limit is not above the maximum possible number of (X-R) radicals.
  • one variable D 1 to D 4 is N and the other variables D 1 to D 4 are CH. More preferably, the number of nitrogen atoms p in the six-membered ring of the benzimidazole structure shown in formula (II) is 0 or 1 .
  • the structural unit (I) or (II) is substituted by at least one substituent. It preferably bears 1 to 8, e.g. 1 , 2, 3, 4, 5, 6, 7 or 8, substituents (X-R), more preferably 2, 3, 4, 5 or 6. In one embodiment, it bears 3, 4 or 5 substituents. In a preferred embodiment, n is 1 to 4, e.g. 1 , 2, 3, 4.
  • the X-R radicals are selected such that they increase the electron density in the aromatic system to which they are bonded directly.
  • the X-R radicals are selected such that they reduce the electron density in the aromatic system to which they are bonded directly.
  • one or some X-R radicals are selected such that they reduce the electron density in the aromatic system to which they are bonded directly, and one or some X-R radicals are selected such that they increase the electron density in the aromatic system to which they are bonded directly.
  • the at least one organic fluorescent dye comprises at least one structural unit of the formulae (III), (IV), (V), (VI), (VII), (VIII), (IX), (X), (XX), (XXI), (XXII),
  • Z is CR 1 R 2 , NR 1 or O.
  • X is a chemical bond, O, S, SO, S0 2 or NR 1 ;
  • R is an aliphatic or cycloaliphatic radical selected from
  • a -U-aryl radical which may be mono- or polysubstituted by the above radicals mentioned as substituents for the aryl radicals (iii), where U is a -0-, -S-, -NR 1 -, -CO-, -SO- or -SO2- moiety;
  • R 1 , R 2 , R 3 are each independently hydrogen;
  • Ci-Cis-alkyl whose carbon chain may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted by Ci-Ci2-alkoxy, C1-C6- alkylthio, hydroxyl, mercapto, halogen, cyano, nitro and/or -COOR 1 ;
  • aryl or hetaryl to each of which may be fused further saturated or unsaturated 5- to 7- membered rings whose carbon skeleton may comprise one or more -0-, -S-, -CO- and/or -SO2- moieties, where the overall ring system may be mono- or polysubstituted by Ci-Ci2-alkyl and/or the above radicals mentioned as substituents for alkyl.
  • X is a chemical bond, O, S, N R 1 and
  • R is an aliphatic or cycloaliphatic radical selected from
  • Ci Ci to C100 alkyl or cycloalkyl
  • aryl or hetaryl where the ring system may be mono- or polysubstituted by: C1-C18- alkyl, Ci-Ci2-alkoxy;
  • a -U-aryl radical which may be mono- or polysubstituted by the above radicals mentioned as substituents for the aryl radicals (iii), where U is a -0-, -S-, -NR 1 -, -CO-, -SO- or -SO2- moiety;
  • R 1 , R 2 , R 3 are each independently hydrogen; Ci-Cis-alkyl whose carbon chain may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted by Ci-Ci2-alkoxy, Ci-C6-alkylthio, hydroxyl, mercapto, halogen, cyano, nitro and/or -COOR 1 ;
  • R comprises compounds with what is called swallowtail substitution, as specified in WO 2009/037283 A1 at page 16 line 19 to page 25 line 8. Accordingly, R may be selected, for example, from:
  • R radical specified in the compounds of the formula (II) are 1 ,2,2'-tribranched alkyl radicals. These are specifically:
  • R radicals are 1 -(1 -methylethyl)-2-methylpropyl
  • R is a 1 -alkylalkyl, for example 1 -ethylpropyl, 1 -propylbutyl,
  • X-R preferred (X-R) radicals are: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, 2-methylpentyl, heptyl, 1 -ethylpentyl, octyl, 2-ethylhexyl, isooctyl, nonyl, isononyl, decyl, isodecyl, undecyl, dodecyl, tridecyl, isotridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octa
  • 17-octadecenyl methylamino, ethylamino, propylamino, isopropylamino, butylamino, isobutylamino, pentylamino, hexylamino, dimethylamino, methylethylamino, diethylamino, dipropylamino, diisopropylamino, dibutylamino, diisobutylamino, dipentylamino, dihexylamino, dicyclopentyl- amino, dicyclohexylamino, dicycloheptylamino, diphenylamino and dibenzylamino; formylamino, acetylamino, propionylamino and benzoylamino; carbamoyl, methylaminocarbonyl, ethylaminocarbonyl, propylaminocarbonyl, butylamino- carbonyl, pen
  • 6- quinaldyl 3-, 5-, 6- and 8-quinolinyl, 2-benzoxazolyl, 2-benzothiazolyl, 5-benzothiadiazolyl, 2- and 5-benzimidazolyl and 1 - and 5-isoquinolyl; 1 -, 2-, 3-, 4-, 5-, 6- and 7-indolyl, 1 -, 2-, 3-, 4-, 5-, 6- and 7-isoindolyl, 5-(4-methylisoindolyl),
  • X is a single bond.
  • (X-R) is phenyl, naphthyl, anthranyl, phenanthrenyl, pyrenyl, benzopyrenyl, fluorenyl, indanyl, indenyl, tetralinyl, phenoxy, thiophenoxy, C1-C12 alkoxyphenyl, each of which may be mono- or polysubstituted by identical or different radicals (i), (ii), (iii), (iv) and/or (v):
  • Ci-Ci2-alkoxy hydroxyl, halogen, cyano and/or aryl which may be mono- or polysubstituted by Ci-Cis-alkyl and/or Ci-C6-alkoxy;
  • -NR 1 -, -CR 1 CR 1 - and/or -CO- moieties and which may be mono- or
  • Ci-Cis-alkyl Ci-Ci2-alkoxy and/or Ci-C6-alkylthio;
  • a -U-aryl radical which may be mono- or polysubstituted by the above radicals mentioned as substituents for the aryl radicals (iii), where U is a -0-, -S-, -NR 1 -,
  • Ci-Ci2-alkoxy, Ci-C 6 -alkylthio, -C ⁇ CR 1 , -CR 1 CR 1 2 , hydroxyl, mercapto,
  • R 1 , R 2 , R 3 are each independently hydrogen
  • Ci-Cis-alkyl whose carbon chain may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted by Ci-Ci2-alkoxy, C1-C6- alkylthio, hydroxyl, mercapto, halogen, cyano, nitro and/or -COOR 1 ;
  • aryl or hetaryl to each of which may be fused further saturated or unsaturated 5- to 7-membered rings whose carbon skeleton may comprise one or more -0-, -S-, -CO- and/or -SO2- moieties, where the overall ring system may be mono- or polysubstituted by Ci-Ci2-alkyl and/or the above radicals mentioned as substituents for alkyl.
  • (X-R) is phenyl, naphthyl, anthranyl, phenanthrenyl, pyrenyl, benzopyrenyl, fluorenyl, indanyl, indenyl, tetralinyl, phenoxy, thiophenoxy, C1-C12 alkoxyphenyl, each of which may be mono- or polysubstituted by identical or different radicals (i), (ii), (iii), (iv) and/or (v):
  • Ci-Ci2-alkoxy hydroxyl, halogen, cyano and/or aryl which may be mono- or polysubstituted by Ci-Cis-alkyl and/or Ci-C6-alkoxy;
  • Ci-Cis-alkyl Ci-Ci2-alkoxy and/or Ci-C6-alkylthio;
  • a -U-aryl radical which may be mono- or polysubstituted by the above radicals mentioned as substituents for the aryl radicals (iii), where U is a -0-, -S-, -NR 1 -, -CO-, -SO- or -SO2- moiety;
  • Ci-Ci2-alkoxy, Ci-C 6 -alkylthio, -C ⁇ CR 1 , -CR 1 CR 1 2 , hydroxyl, mercapto,
  • R 1 , R 2 , R 3 are each independently hydrogen;
  • Ci-Cis-alkyl whose carbon chain may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted by Ci-Ci2-alkoxy, C1-C6- alkylthio, hydroxyl, mercapto, halogen, cyano, nitro and/or -COOR 1 ;
  • aryl or hetaryl to each of which may be fused further saturated or unsaturated 5- to 7-membered rings whose carbon skeleton may comprise one or more -0-, -S-, -CO- and/or -SO2- moieties, where the overall ring system may be mono- or polysubstituted by Ci-Ci2-alkyl and/or the above radicals mentioned as substituents for alkyl.
  • the at least one organic fluorescent dye consists of at least one structural unit of the formulae (II), (III), (IV), (V), (VI), (VII), (VIII), (IX), (X), (XX), (XXI), (XXII), (XXIII), (XIV), (XXV) or (XXVI).
  • the organic fluorescent dye has a structure which is identical with the structural unit of the formulae (II), (III), (IV), (V), (VI), (VII), (VIII), (IX), (X), (XXI), (XXII), (XXIII), (XIV), (XXV) or (XXVI).
  • the organic fluorescent dye has a structure of the formula (II), where none of the CH groups of the six-membered ring of the benzimidazole structure are replaced by nitrogen.
  • n is 2, 3, 4 or 5, preferably 3 or 4.
  • X-R is phenyl.
  • the organic dye is selected from
  • the at least one organic fluorescent dye has a structure as shown in formula (XV)
  • F represents identical or different structural units (I) to (X) or (XX) to (XXVI) as defined above, and A is any organic radical to which F is chemically bonded.
  • A is selected from a polymer P, an aromatic ring system, a molecule with a plurality of aromatic ring systems, a polyhydric alcohol, a polyfunctional amine.
  • polyhydric alcohols examples include sugars, glycerol, trimethylolpropane, pentaerythritol or alkoxylates thereof.
  • the polymer P may be the polymer which is present in accordance with the invention in the color converters, to which the organic fluorescent dye is chemically bound in this case.
  • polymers P are dendritic or hyperbranched polymers.
  • organic fluorescent dyes are selected from
  • n is a number from 0, 1 , 2, 3, 4, 5, 6, 7, 8, 9 or 10;
  • R 1 is independently hydrogen, Ci-Cis-alkyl or cycloalkyl, the carbon chain of which may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted;
  • aryl or hetaryl which may be mono- or polysubstituted.
  • Suitable organic fluorescent dyes may be present either dissolved in the polymer or as a homogeneously distributed mixture.
  • the organic fluorescent dyes are preferably present dissolved in the polymer.
  • the organic fluorescent dye can be prepared according to standard methods or as described in the experimental part of this application.
  • color converters comprise, in addition to the at least one inventive organic fluorescent dye, also further fluorescent colorants.
  • the at least one inventive organic fluorescent dye can be combined with a red-fluorescing fluorescent colorant.
  • fluorescent colorants are combined with one another so as to obtain color converters which can convert blue to white light with good color reproduction.
  • Suitable further fluorescent colorants are, for example, those specified in "Luminescence - from Theory to Applications” Cees Ronda [eds.], Wiley-VCH, 2008, Chapter 7, "Luminescent Materials for Phosphor-Converted LEDs", Th. Justel, pages 179-190.
  • further fluorescent colorants are, for example, inorganic fluorescent colorants based on cerium-doped yttrium aluminium garnet (Ce-YAG), or fluorescent colorants comprising Eu 3+ , Eu 2+ or Tb 3+ .
  • all organic red or pink fluorescent dyes are particularly suitable.
  • further fluorescent colorants comprise further orange- or yellow-fluorescing fluorescent dyes.
  • Suitable fluorescent red dyes have, for example, the general formula
  • n 1 to 4, e.g. 1 , 2, 3, or 4;
  • R 4 Ci to C30 alkyl or cycloalkyl, aryl, hetaryl, alkaryl, aralkyl,
  • R 5 aryloxy, Ci to C10 alkyl-substituted aryloxy, Ci to C30 alkoxy,
  • R 5 radicals are at one or more positions identified by * .
  • R 4 is Ci to C10 alkyl, 2,6-dialkylaryl, 2,4-dialkylaryl.
  • R 4 is 2,6-diisopropylphenyl, 2,4-di-tert-butylphenyl.
  • R 5 is preferably phenoxy, or Ci to C10 alkylphenoxy, more preferably 2,6-dialkylphenoxy, 2,4-dialkylphenoxy. Especially preferably, R 5 is phenoxy, 2,6-diisopropylphenoxy, 2,4-di-tert- butylphenoxy.
  • suitable organic fluorescent dyes are perylene derivatives selected from the formulae XXX-1 , XXX-2 and XXX-3,
  • R 4 is as defined above and preferably has one of the preferred meanings
  • Y is linear or branched Ci to C10 alkyl
  • y is 0, 1 , 2, or 3.
  • further organic fluorescent dyes are the perylene derivatives specified in WO2007/006717 at page 1 line 5 to page 22 line 6.
  • Particularly suitable further organic fluorescent dyes are N,N'-bis(2,6-diisopropylphenyl)- 1 ,6,7,12-tetraphenoxyperylene-3,4;9,10-tetracarboximide, N,N'-bis(2,6-diisopropylphenyl)- 1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide or N,N'-bis(2,6-diisopropyl- phenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide.
  • the further organic fluorescent dye is preferably selected from N,N'-bis(2,6-diisopropylphenyl)-1 ,7-di(2,6- diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide, N,N'-bis(2,6-diisopropylphenyl)-1 ,6- di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and mixtures thereof.
  • inventive color converters additionally comprise at least one further organic fluorescent dye of the formula
  • the inventive color converters have a layer structure. They may have either a single-layer structure or a multilayer structure, generally composed of several polymer layers comprising one or more fluorescent colorants and/or scattering bodies.
  • the color converters consist of several polymer layers which have been laminated together to form a composite, and wherein the different fluorescent colorants and/or scattering bodies may be present in different polymer layers.
  • inventive color converters comprise more than one fluorescent colorant, it is possible in one embodiment of the invention for several fluorescent colorants to be present alongside one another in one layer.
  • the different fluorescent colorants are present in different layers.
  • inventive color converters comprise, in addition to the at least one organic fluorescent dye present in accordance with the invention, at least one further organic fluorescent dye according to formula (XXX), scattering bodies based on T1O2 and at least one polymer consisting essentially of polystyrene or polycarbonate.
  • inventive color converters comprise, in addition to the at least one organic fluorescent dye present in accordance with the invention, at least one further organic fluorescent dye according to formula (XXX) and at least one further organic fluorescent dye according to formula (XXXI) or (XXXII), scattering bodies based on ⁇ 2 and at least one polymer consisting essentially of polystyrene or polycarbonate.
  • inventive color converters comprise, in addition to the at least one organic fluorescent dye present in accordance with the invention, at least one further red organic fluorescent dye selected from N,N'-bis(2,6-diisopropylphenyl)-1 ,6,7,12- tetraphenoxyperylene-3,4;9,10-tetracarboximide or N,N'-bis(2,6-diisopropylphenyl)-1 ,7-di(2,6- diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide or N,N'-bis(2,6-diisopropylphenyl)-1 ,6- di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide, and at least one further organic fluorescent dye selected from N,N'-bis(2,6-diisopropylphenyl)perylene-3,4;9, and at least one further organic
  • the concentration of inventive organic fluorescent dyes is 0.0001 to 0.5% by weight, preferably 0.002 to 0.1 % by weight, most preferably 0.005 to 0.05% by weight, based in each case on the amount of polymer used.
  • the concentration of the red organic fluorescent dye is typically 0.001 to 0.5% by weight, preferably 0.002 to 0.1 % by weight, most preferably 0.005 to 0.05% by weight, based on the amount of the polymer used.
  • the ratio of at least one inventive organic fluorescent dye to at least one further red organic fluorescent dye is typically in the range from 4:1 to 12:1 , preferably 5:1 to 10:1 , especially 6:1 to 8:1 .
  • inventive color converters comprise
  • inventive color converters comprise
  • inventive color converters comprise
  • inventive color converters comprise
  • inventive color converters comprise at least one compound selected from
  • organic fluorescent dye scattering bodies based on ⁇ 2 and at least one polymer consisting essentially of polystyrene. According to a specific aspect of this
  • the inventive color converter additionally comprises N,N'-bis(2,6- diisopropylphenyl)-1 ,6,7,12-tetraphenoxyperylene-3,4;9,10-tetracarboximide as the red organic fluorescent dye.
  • the inventive color converter additionally comprises a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide.
  • a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,
  • inventive color converters comprise at least one compound selected from
  • the inventive organic fluorescent dye scattering bodies based on ⁇ 2 and at least one polymer consisting essentially of polycarbonate.
  • the inventive color converter additionally comprises N,N'-bis(2,6- diisopropylphenyl)-1 ,6,7,12-tetraphenoxyperylene-3,4;9,10-tetracarboximide as the red organic fluorescent dye.
  • the inventive color converter additionally comprises a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide.
  • a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,
  • the inventive organic fluorescent dye scattering bodies based on ⁇ 2 and at least one polymer consisting essentially of polycarbonate.
  • the inventive color converter additionally comprises N,N'-bis(2,6- diisopropylphenyl)-1 ,6 ,7,12-tetraphenoxyperylene-3,4;9,10-tetracarboximide as the red organic fluorescent dye.
  • the inventive color converter additionally comprises a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide.
  • a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,
  • inven comprise
  • organic fluorescent dye scattering bodies based on ⁇ 2 and at least one polymer consisting essentially of polystyrene. According to a specific aspect of this
  • the inventive color converter additionally comprises N,N'-bis(2,6- diisopropylphenyl)-1 ,6,7,12-tetraphenoxyperylene-3,4;9,10-tetracarboximide as the red organic fluorescent dye.
  • the inventive color converter additionally comprises a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide.
  • a red organic fluorescent dye selected from N,N'-bis(2,6- diisopropylphenyl)-1 ,7-di(2,6-diisopropylphenoxy)perylene-3,4;9,10-tetracarboximide and ⁇ , ⁇ '- bis(2,6-diisopropylphenyl)-1 ,6-di(2,6-diisopropylphenoxy)perylene-3,
  • one layer comprises at least one red fluorescent dye and another layer at least one fluorescent dye encompassed by the invention.
  • the at least one red organic fluorescent dye is present in the layer of the color converter facing the LED.
  • the at least one green or green-yellow fluorescent dye is present in the layer of the color converter facing the LED.
  • the color converter has a two-layer structure with a red-fluorescing layer and a green-yellow-fluorescing layer comprising at least one fluorescent dye present in accordance with the invention, with the red layer facing the blue light source.
  • both layers comprise ⁇ 2 as a scattering body.
  • a further preferred embodiment for color converters has a one-layer structure, comprising at least one yellow fluorescent dye present in accordance with the invention and at least one red fluorescent dye of the formula (XXX) and scattering bodies in one layer.
  • the polymer consists preferably of polystyrene or polycarbonate.
  • At least one polymer layer of the color converter has been mechanically reinforced with glass fibres.
  • Inventive color converters may be present in any geometric arrangement.
  • the color converters may be present, for example, in the form of films, sheets or plaques. It is likewise possible for the matrix comprising organic fluorescent colorants to be present in droplet or hemispherical form, or in the form of lenses with convex and/or concave, flat or spherical surfaces.
  • Casting refers to the embodiment where LEDs or components comprising LEDs are fully cast or enveloped with polymer comprising an organic fluorescent dye.
  • the polymer layers (matrices) comprising organic fluorescent dye are 25 to 200 micrometres in thickness, preferably 35 to 150 ⁇ and more preferably 50 to 100 ⁇ .
  • the polymer layers comprising organic fluorescent dye are 0.2 to 5 millimetres in thickness, preferably 0.3 to 3 mm, more preferably 0.4 to 1 mm.
  • the individual layers in a preferred embodiment, are continuous and do not have any holes or interruptions.
  • the concentration of the organic fluorescent dyes in the polymer depends on factors including the thickness of the color converter and of the polymer layer. If a thin polymer layer is used, the concentration of the organic fluorescent dye is generally higher than in the case of a thick polymer layer.
  • the concentration of the organic fluorescent dyes is 0.001 to 0.5% by weight, preferably 0.002 to 0.1 % by weight, most preferably 0.005 to 0.05% by weight, based in each case on the amount of the polymer.
  • the concentration of the red organic fluorescent dye is 0.001 to 0.5% by weight, preferably 0.002 to 0.1 % by weight, most preferably 0.005 to 0.05% by weight, based on the amount of polymer used.
  • at least one of the layers or matrices comprising fluorescent dye comprises scattering bodies for light.
  • multilayer structure In a further preferred embodiment of the multilayer structure, several layers comprising fluorescent dye and one or more layers comprising scatterers without fluorescent dye are present.
  • Suitable scattering bodies are inorganic white pigments, for example titanium dioxide, barium sulphate, lithopone, zinc oxide, zinc sulphide, calcium carbonate with a mean particle size to DIN 13320 of 0.01 to 10 ⁇ , preferably 0.1 to 1 ⁇ , more preferably 0.15 to 0.4 ⁇ .
  • Scattering bodies are included typically in an amount of 0.01 to 2.0% by weight, preferably 0.05 to 0.5% by weight, more preferably 0.1 to 0.4% by weight, based in each case on the polymer of the layer comprising scattering bodies.
  • Inventive color converters may optionally comprise further constituents, such as a carrier layer.
  • Carrier layers serve to impart mechanical stability to the color converter.
  • the type of material of the carrier layers is not crucial, provided that it is transparent and has the desired mechanical strength.
  • Suitable materials for carrier layers are, for example, glass or transparent rigid organic polymer, such as polycarbonate, polystyrene or polymethacrylates or polymethyl methacrylates.
  • Carrier layers generally have a thickness of 0.1 mm to 10 mm, preferably 0.3 mm to 5 mm, more preferably 0.5 mm to 2 mm.
  • inventive color converters have at least one barrier layer against oxygen and/or water, as disclosed in the application EP 1 1003839.5 (now
  • barrier materials for barrier layers are, for example, glass, quartz, metal oxides, S1O2, a multilayer system composed of alternating layers of AI2O3 and S1O2 layers, titanium nitride, Si02/metal oxide multilayer materials, polyvinyl alcohol,
  • PVDC polyvinylidene chloride
  • LCPs liquid-crystalline polymers
  • SAN polystyrene-acrylonitrile
  • PBT polybutylene terephthalate
  • PBN polybutylene naphthalate
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PVT polyvinyl butyrate
  • PVVC polyvinyl chloride
  • polyamides polyoxymethylenes
  • polyimides polyether imides
  • EVA ethylene vinyl acetate
  • EVOH ethylene vinyl alcohol
  • a preferred material for barrier layers is glass or a multilayer system composed of alternating layers of AI2O3 and S1O2 layers.
  • suitable barrier layers have a low oxygen permeability.
  • suitable barrier layers have a low oxygen and water permeability.
  • Inventive color converters are especially suitable for the conversion of blue light to green-yellow light.
  • Suitable LEDs are, for example, those based on gallium nitride (GaN). It is likewise possible to use them for conversion of light produced by mercury lamps, by organic light-emitting diodes (OLEDs) or by UV-LEDs.
  • OLEDs organic light-emitting diodes
  • inventive color converters are used for the conversion of blue light to white light.
  • inventive color converters exhibit a high quantum yield on irradiation with light, especially with blue LED light.
  • they have a long lifetime and especially a high photostability on illumination with blue light. They emit pleasant light with good color reproduction.
  • Inventive color converters can be produced by different processes.
  • the process for producing inventive color converters comprises the dissolution of the at least one polymer and of the at least one organic fluorescent dye in a solvent and subsequent removal of the solvent. In another embodiment, the process for production of inventive color converters comprises the extrusion of the at least one organic fluorescent dye with the at least one polymer.
  • the invention further provides illumination devices comprising at least one LED and at least one inventive color converter.
  • the at least one LED is preferably blue and emits light preferably within a wavelength range from 400 to 500 nm, preferably 420 to 480 nm, more preferably 440 to 470 nm, most preferably 445 to 460 nm.
  • inventive illumination devices comprise exactly one LED. In another embodiment, inventive illumination devices comprise several LEDs.
  • inventive illumination devices comprise several LEDs, all of which are blue. In another embodiment, inventive illumination devices comprise several LEDs, at least one LED being blue and at least one LED not being blue, but rather emitting light in another color, for example red.
  • the type of LED used is not crucial for the inventive illumination devices.
  • the power density of the LED used is less than 20 mW/cm 2 , preferably less than 15 mW/cm 2 .
  • the use of LEDs of higher power densities such as 25 or 30 mW/cm 2 is likewise possible.
  • a higher power density of the LED can, however, reduce the lifetime of the fluorescent dyes and of the color converters.
  • Inventive color converters can be used in combination with LEDs in virtually any geometric shape and irrespective of the structure of the illumination device.
  • color converter and LED are present in a phosphor on a chip arrangement.
  • inventive color converters are used in a remote phosphor structure.
  • the color converter is spatially separated from the LED.
  • the distance between LED and color converter is from 0.1 cm to 50 cm, preferably 0.2 to 10 cm and most preferably 0.5 to 2 cm.
  • Between color converter and LED may be different media, such as air, noble gases, nitrogen or other gases, or mixtures thereof.
  • the color converter may, for example, be arranged concentrically around the LED or have a planar geometry. It may be present, for example, as a plaque, sheet, film, in droplet form or as a casting.
  • Inventive illumination devices are suitable for illumination indoors, outdoors, of offices, of vehicles, in torches, games consoles, street lights, illuminated traffic signs.
  • Inventive illumination devices exhibit a high quantum yield. In addition, they have a long lifetime, especially a high photostability on illumination with blue light. They emit pleasant light with good color reproduction.
  • the present invention further provides novel polymer mixtures comprising at least one polymer and at least one organic fluorescent dye, comprising at least one structural unit of the formula (II)
  • n is a number from 0 to (10-p) for each structural unit of the formula (I I , preferably a number from 1 , 2, 3, 4 or to 5 for each structural unit of the formula (II),
  • (X-R) is phenyl, tolyl, ethylphenyl, ortho/meta/para xylyl, mesityl, naphthyl, anthranyl,
  • phenanthrenyl pyrenyl, benzopyrenyl, fluorenyl, indanyl, indenyl, tetralinyl, phenoxy, thiophenoxy, 4-ethoxyphenyl, each of which may be mono- or polysubstituted by identical or different radicals (i), (ii), (iii), (iv) and/or (v):
  • Ci-Ci2-alkoxy hydroxyl, halogen, cyano and/or aryl which may be mono- or polysubstituted by Ci-Cis-alkyl and/or Ci-C6-alkoxy;
  • Ci-Cis-alkyl Ci-Ci2-alkoxy and/or Ci-C6-alkylthio;
  • a -U-aryl radical which may be mono- or polysubstituted by the above radicals mentioned as substituents for the aryl radicals (iii), where U is a -0-, -S-, -NR 1 -, -CO-, -SO- or -SO2- moiety;
  • Ci-Ci2-alkoxy, Ci-C 6 -alkylthio, -C ⁇ CR 1 , -CR 1 CR 1 2 , hydroxyl, mercapto,
  • R 1 , R 2 , R 3 are each independently hydrogen
  • Ci-Cis-alkyl whose carbon chain may comprise one or more -0-, -S-, -CO-, -SO- and/or
  • -SO2- moieties and which may be mono- or polysubstituted by Ci-Ci2-alkoxy, C1-C6- alkylthio, hydroxyl, mercapto, halogen, cyano, nitro and/or -COOR 1 ;
  • aryl or hetaryl to each of which may be fused further saturated or unsaturated 5- to 7- membered rings whose carbon skeleton may comprise one or more -0-, -S-, -CO- and/or -SO2- moieties, where the overall ring system may be mono- or polysubstituted by Ci-Ci2-alkyl and/or the above radicals mentioned as substituents for alkyl.
  • inventive polymer mixtures comprise organic fluorescent dyes selected from 50
  • n is a number from 0, 1 , 2, 3, 4, 5, 6, 7, 8, 9 or 10;
  • R 1 is independently hydrogen, Ci-Cis-alkyl or cycloalkyl, the carbon chain of which may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted;
  • aryl or hetaryl which may be mono- or polysubstituted.
  • a polymer mixture is understood to mean, in the context of this invention, the mixture of at least one suitable polymer with at least one above-described organic fluorescent dye.
  • Polymers suitable for inventive polymer mixtures are in principle all polymers which are capable of dissolving or of homogeneously distributing the at least one organic fluorescent dye in a sufficient amount.
  • Suitable polymers may be inorganic polymers or organic polymers.
  • Suitable inorganic polymers are, for example, silicates or silicon dioxide.
  • a prerequisite for the use of inorganic polymers is that the at least one organic fluorescent dye can be dissolved or homogeneously distributed therein without decomposition. In the case of silicates or silicon dioxide, this can be accomplished, for example, by deposition of the polymer from a waterglass solution.
  • Suitable organic polymers are, for example, polystyrene, polycarbonate, polymethyl methacrylate, polyvinylpyrrolidone, polymethacrylate, polyvinyl acetate, polyvinyl chloride, polybutene, polyethylene glycol, silicone, polyacrylate, epoxy resin, polyvinyl alcohol, polyacrylonitrile, polvinylidene chloride (PVDC), polystyrene-acrylonitrile (SAN), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyvinyl butyrate (PVB), polyvinyl chloride (PVC), polyamides, polyoxymethylenes, polyimides, polyether imide or mixtures thereof.
  • the at least one polymer consists essentially of polystyrene, polycarbonate, polymethyl methacrylate or mixtures thereof.
  • the at least one polymer consists essentially of polystyrene or polycarbonate.
  • Polystyrene is understood here to include all homo- or copolymers which result from
  • styrene polymerization of styrene and/or derivatives of styrene.
  • Derivatives of styrene are, for example, alkylstyrenes such as alpha-methylstyrene, ortho-, meta-, para-methylstyrene, para- butylstyrene, especially para-tert-butylstyrene, alkoxystyrene such as para-methoxystyrene, para-butoxystyrene, para-tert-butoxystyrene.
  • suitable polystyrenes have a mean molar mass M n of 10 000 to 1 000 000 g/mol (determined by GPC), preferably 20 000 to 750 000 g/mol, more preferably 30 000 to
  • the matrix of the color converter consists essentially or completely of a homopolymer of styrene or styrene derivatives.
  • the matrix consists essentially or completely of a styrene copolymer which is likewise considered to be a polystyrene in the context of this application.
  • Styrene copolymers may comprise, as further constituents, for example, butadiene, acrylonitrile, maleic anhydride, vinylcarbazole, or esters of acrylic acid, methacrylic acid or itaconic acid, as monomers.
  • Suitable styrene copolymers comprise generally at least 20% by weight of styrene, preferably at least 40% and more preferably at least 60% by weight of styrene. In another embodiment, they comprise at least 90% by weight of styrene.
  • Preferred styrene copolymers are styrene-acrylonitrile copolymers (SAN) and acrylonitrile-butadiene- styrene copolymers (ABS), styrene-1 ,1 '-diphenylethene copolymers, acrylic ester-styrene- acrylonitrile copolymers (ASA), methyl methacrylate-acrylonitrile-butadiene-styrene copolymers (MABS).
  • a further preferred polymer is alpha-methylstyrene-acrylonitrile copolymer (AMSAN).
  • the styrene homo- or copolymers can be prepared, for example, by free-radical polymerization, cationic polymerization, anionic polymerization, or under the influence of organometallic catalysts (for example Ziegler-Natta catalysis). This can lead to isotactic, syndiotactic, atactic polystyrene or copolymers. They are preferably prepared by free-radical polymerization.
  • the polymerization can be performed as a suspension polymerization, emulsion polymerization, solution polymerization or bulk polymerization.
  • suitable polystyrenes is described, for example, in Oscar Nuyken,
  • Polystyrenes and Other Aromatic Polyvinyl Compounds in Kricheldorf, Nuyken, Swift, New York 2005, p. 73-150 and literature cited therein; and in Elias, Macromolecules, Weinheim 2007, p. 269-275.
  • Polycarbonates are polyesters of carbonic acid with aromatic or aliphatic dihydroxyl
  • Preferred dihydroxyl compounds are, for example, methylenediphenyldihydroxyl compounds, for example bisphenol A.
  • polycarbonates One means of preparing polycarbonates is the reaction of suitable dihydroxyl compounds with phosgene in an interfacial polymerization. Another means is the reaction with diesters of carbonic acid, such as diphenyl carbonate, in a condensation polymerization.
  • polymers which have been polymerized with exclusion of oxygen are used.
  • the monomers preferably comprised, during the polymerization, a total of at most 1000 ppm of oxygen, more preferably at most 100 ppm and especially preferably at most 10 ppm.
  • Suitable polymers may comprise, as further constituents, additives such as flame retardants, antioxidants, light stabilizers, UV absorbers, free-radical scavengers, antistats.
  • additives such as flame retardants, antioxidants, light stabilizers, UV absorbers, free-radical scavengers, antistats.
  • Suitable antioxidants or free-radical scavengers are, for example, phenols, especially sterically hindered phenols such as butylhydroxyanisole (BHA) or butylhydroxytoluene (BHT), or sterically hindered amines (HALS).
  • BHA butylhydroxyanisole
  • BHT butylhydroxytoluene
  • HALS sterically hindered amines
  • antioxidants and free-radical scavengers can be supplemented by secondary stabilizers such as phosphites or phosphonates, as sold, for example, by BASF under the Irgafos ®
  • Suitable UV absorbers are, for example, benzotriazoles such as 2-(2-hydroxyphenyl)-2H- benzotriazoles (BTZ), triazines such as (2-hydroxyphenyl)-s-triazines (HPT),
  • hydroxybenzophenones BP
  • oxalanilides BP
  • UV absorbers are sold, for example by BASF under the Uvinul ® trade name.
  • suitable polymers do not comprise any antioxidants or free-radical scavengers.
  • suitable polymers are transparent polymers. In another embodiment, suitable polymers are opaque polymers.
  • the polymers mentioned serve as matrix material for the at least one organic fluorescent dye.
  • the at least one organic fluorescent dye may be present either dissolved in the polymer or as a homogeneously distributed mixture.
  • the at least one organic fluorescent dye is present dissolved in the polymer.
  • the at least one organic fluorescent dye is likewise present in the polymer as a homogeneously distributed mixture.
  • Inventive polymer mixtures may be present, for example, as powder or granules. They may likewise be in the form of plaques, sheets, films.
  • Inventive polymer mixtures exhibit a high fluorescence quantum yield on irradiation with light, especially with blue LED light. In addition, they have a long lifetime, especially a high photostability on illumination with blue light. They emit pleasant light with good color reproduction.
  • the present invention further provides novel fluorescent dyes.
  • (X-R) is phenyl, naphthyl, anthranyl, phenanthrenyl, pyrenyl, benzopyrenyl, fluorenyl, indanyl, indenyl, tetralinyl, phenoxy, thiophenoxy, C1-C12 alkoxyphenyl, each of which may be mono- or polysubstituted by identical or different radicals (i), (ii), (iii),
  • Ci-Ci2-alkoxy hydroxyl, halogen, cyano and/or aryl which may be mono- or polysubstituted by Ci-Cis-alkyl and/or Ci-C6-alkoxy;
  • Ci-Cis-alkyl Ci-Ci2-alkoxy and/or Ci-C6-alkylthio;
  • a -U-aryl radical which may be mono- or polysubstituted by the above radicals mentioned as substituents for the aryl radicals (iii), where U is a -0-, -S-, -NR 1 -, -CO-, -SO- or -SO2- moiety;
  • Ci-Ci2-alkoxy, Ci-C 6 -alkylthio, -C ⁇ CR 1 , -CR 1 CR 1 2 , hydroxyl, mercapto,
  • R 1 , R 2 , R 3 are each independently hydrogen
  • Ci-Cis-alkyl whose carbon chain may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted by Ci-Ci2-alkoxy, Ci-
  • aryl or hetaryl to each of which may be fused further saturated or unsaturated 5- to 7-membered rings whose carbon skeleton may comprise one or more -0-, -S-, -CO- and/or -SO2- moieties, where the overall ring system may be mono- or polysubstituted by Ci-Ci2-alkyl and/or the above radicals mentioned as substituents for alkyl.
  • inventive fluorescent dyes have a structure in which the symbols in formula (II) are each defined as follows: n is a number from 1 to 5, e.g. 1 , 2, 3, 4, or 5 for each structural unit of the formula (II),
  • (X-R) is phenyl, tolyl, ethylphenyl, ortho/meta/para xylyl, mesityl, naphthyl, anthranyl, phenanthrenyl, pyrenyl, benzopyrenyl, fluorenyl, indanyl, indenyl, tetralinyl, phenoxy, thiophenoxy, 4-ethoxyphenyl.
  • fluorescent dyes selected from:
  • n is a number from 0 to 10, e.g. 0, 1 , 2, 3, 4, 5, 6, 7, 8, 9 or 10 f;
  • R 1 is independently hydrogen, Ci-Cis-alkyl or cycloalkyl, the carbon chain of which may comprise one or more -0-, -S-, -CO-, -SO- and/or -SO2- moieties and which may be mono- or polysubstituted;
  • aryl or hetaryl which may be mono- or polysubstituted.
  • Inventive organic fluorescent dyes exhibit a high quantum yield on irradiation with light, especially with blue LED light. In addition, they have a long lifetime, especially a high photostability on illumination with blue light. They emit pleasant light with good color reproduction.
  • Suitable organic fluorescent dyes and especially inventive organic fluorescent dyes can be produced by different processes.
  • One process comprises the condensation of a naphthylenic anhydride with a 1 ,2-diamino- substituted aromatic or heteroaromatic, the bromination of the condensation product and the subsequent substitution of the bromine atoms by the desired substituents, e.g. phenyl.
  • naphthylenic anhydrides are used with a 1 ,2-diamino-substituted aromatic or heteroaromatic which already bears the desired substituents of the end product.
  • the products can be purified, for example, by column chromatography or by crystallization.
  • the fluorescent dyes produced according to the examples were used to produce color converters. For this purpose, they were incorporated into a matrix of a polymer, as described hereinafter.
  • the polymer used was PMMA, a transparent homopolymer of methyl methacrylate with a Vicat softening temperature of 96°C to DIN EN ISO 306 (Plexiglas ® 6N from Evonik).
  • Approx. 2.5 g of polymer and 0.02% by weight of dye were dissolved in approx. 5 ml of methylene chloride, and 0.5% by weight of T1O2 were dispersed therein, based in each case on the amount of polymer used.
  • the resulting solution/dispersion was coated onto a glass surface with a box-type coating bar (wet film thickness 400 ⁇ ). After the solvent had dried off, the film was detached from the glass and dried at 50°C in a vacuum drying cabinet overnight.
  • FQY fluorescence quantum yield
  • Fluorescence quantum yield (FQY) in PMMA 77%.
  • the residue was twice more suspended in 500 ml each time of 1 molar hydrochloric acid and filtered off with suction, and the residue was washed with 2.5 I of hot demineralized water, then washed twice with 50 ml each time of methanol.
  • the residue was recrystallized in 500 ml of toluene, and washed with toluene, and the pale yellow product was dried at 60°C under reduced pressure overnight. Yield: 56%.
  • NMP N-methylpyrrolidone
  • dichloromethane 10.0 g (25 mmol) of 7,14-diphenylbenzofluoranthene (prepared as described in WO 2010/031833) and 6.45 g (36 mmol) of N-bromosuccinimide was stirred at room temperature for 20 hours. Subsequently, the dichloromethane was removed by distillation and the product was precipitated by adding water. The product was filtered and dried. This gave 12.1 g of the product as a beige solid. Yield: quantitative.
  • Example 4b Preparation of A mixture of 160 ml of toluene, 1 .76 g (3.64 mmol) of the product from Example 4a, 1 .60 g (4.00 mmol) of the boron compound from 4, 13.1 g of potassium carbonate, 80 ml of water, 32 ml of ethanol and 2.1 g (1 .82 mmol) of tetrakis(triphenylphosphine)palladium was heated to 65°C for 16 hours. The organic phase was removed, dried over magnesium sulphate and purified by column chromatography using silica gel with toluene as the eluent. This gave 2.0 g (82%) of yellow product.
  • the brown residue was purified by means of column chromatography (silica gel 60, dichloromethane).
  • the orange solid was purified with a further column chromatography step (silica gel 60, 1/1 toluene/cyclohexane). This gave an orange solid which, according to mass spectroscopy analysis, corresponded to a mixture of essentially di- to tetra-pyrenyl- substituted compounds.
  • the brown-red residue was purified by means of column chromatography (silica gel 60, 5/1 toluene/cyclohexane). The result was an orange solid which, according to mass spectroscopy analyses, was a mixture of di-, tri- and tetrasubstituted compounds.
  • the brown residue was purified by means of column chromatography (silica gel 60, 6/1 toluene/cyclohexane). The result was an orange solid which, according to mass spectroscopy analyses, was a mixture of di-, tri- and tetrasubstituted compounds.
  • Example 1 1 Preparation of a mixture of
  • a mixture of 1 .58 g (4 mmol) of the borated compound from Example 10 and 1 .27 g (36.4 mmol) of the brominated compound from Example 9 was heated to 40°C in 160 ml of toluene, and a solution of 80 ml of water, 13.1 g of potassium carbonate and 32 ml of ethanol, 2.1 g (1 .8 mmol) of tetrakis(triphenylphosphine)palladium(0) were added, and the mixture was heated to 65°C for 12 hours.
  • the precipitated solid is filtered off with suction after 1 hour, and the residue is twice more suspended in 100 ml each time of 1 molar hydrochloric acid and filtered off with suction, washed with 500 ml of hot demineralized water, then washed twice with 10 ml each time of methanol.
  • the orange residue is suction-dried with n-pentane.
  • the precipitated solid was filtered off with suction after 1 hour, the residue was twice more suspended in 100 ml each time of 1 molar hydrochloric acid and filtered off with suction, washed with 500 ml of hot demineralized water, then washed twice with 10 ml each time of methanol, and the orange residue was suction-dried with n-pentane.
  • Example 22 Preparation of 2-nitro-4-phenylaniline A suspension of 2-nitro-4-bromaniline (5 g, 23 mmol) in toluene was admixed with 2.8 g (23 mmol) of phenylboronic acid, 9.5 g (0.069 mol) of potassium carbonate and 1.3 g of tetrakis(triphenylphosphine)palladium. The mixture was heated to reflux for 4 hours and the reaction was stopped by adding 100 ml of water. The mixture was extracted with ethyl acetate and dried over sodium sulphate, and the solvent was removed under reduced pressure.
  • a suspension of 2-nitro-4-bromoaniline (5 g, 23 mmol) in toluene is admixed with 3.27 g (23 mmol) of 2-naphthylboronic acid, 9.5 g (0.069 mol) of potassium carbonate and 1.3 g of tetrakis(triphenylphosphine)palladium.
  • the mixture is heated to reflux for 4 hours and the reaction is stopped by adding 100 ml of water.
  • the mixture is extracted with ethyl acetate and dried over sodium sulphate, and the solvent is removed under reduced pressure.
  • the residue is twice more suspended with 35 ml each time of 1 molar hydrochloric acid and filtered off with suction, and washed with hot demineralized water and methanol.
  • the orange residue is purified by means of column chromatography (silica gel 60; 2/1 toluene/dichloromethane).
  • inventive fluorescent dye based on the amount of polymer used, or 0.2% by weight of inventive fluorescent dye, based on the amount of polymer used, or 0.2% by weight of noninventive fluorescent dye
  • the production was effected, in a first embodiment, by solution processing.
  • the polymer was dissolved in methylene chloride and then either T1O2 or the respective fluorescent dye was added.
  • the mixture was stirred overnight and then spread out on a metal sheet to evaporate the solvent.
  • the film obtained was detached, comminuted, dried at 50°C in a vacuum drying cabinet overnight, and then ground to a fine powder in a laboratory mill.
  • the masterbatch was produced, in a second embodiment, by intimately mixing the components in an IKA kneader at a temperature of 200°C and comminuting the mixture, for example by means of hot cutting of the extrudate and subsequent cooling.
  • the powders of the above-described masterbatches were combined with undoped polymer and mixed. This blend was then either processed to a blend material in a solution operation or melted and mixed in a mini extruder at a temperature of 200°C.
  • the pulverulent converter material was used to produce, by hot pressing on a Collin P 200 PV heated vacuum press:
  • the basis used for this measurement was an apparatus which consists of 16 blue LEDs arranged in a matrix (peak wavelength 450-452 nm).
  • the color converter plaque was placed onto this arrangement. Then the light emitted through the plaque and by the plaque was measured by an integral measurement with a large Ulbricht sphere, ISP 500-100, and a CAS 140CT-156 CCD detector (from Instrument Systems, Kunststoff).
  • CCT correlated color temperature
  • Figure 1 shows emission spectra of color converters plaques on illumination with 450 nm LEDs.
  • the color converter plaques comprise an inventive yellow fluorescent dye,

Abstract

Cette invention concerne un convertisseur de couleurs comprenant au moins un polymère et au moins un colorant fluorescent organique comprenant au moins un motif structural de formule (I). Le motif structural peut être mono- ou polysubstitué par des substituants identiques ou différents et un ou plusieurs groupes CH du cycle à six chaînons de la structure benzimidazole illustrée peuvent être remplacés par un atome d'azote.
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US10230023B2 (en) 2019-03-12
KR102023787B1 (ko) 2019-09-20
DK2718395T3 (en) 2018-06-06
KR20140051214A (ko) 2014-04-30
WO2012168395A1 (fr) 2012-12-13
BR112013030704B8 (pt) 2022-03-22
JP6092198B2 (ja) 2017-03-08
ES2671232T3 (es) 2018-06-05
CN103619987B (zh) 2016-11-16
TWI561612B (en) 2016-12-11
TW201307525A (zh) 2013-02-16
BR112013030704A2 (pt) 2020-07-21
US20140103374A1 (en) 2014-04-17
US9406848B2 (en) 2016-08-02
US20160284947A1 (en) 2016-09-29
EP2718395B1 (fr) 2018-02-28
CN103619987A (zh) 2014-03-05
BR112013030704B1 (pt) 2021-06-15
RU2013158678A (ru) 2015-07-20
RU2608411C2 (ru) 2017-01-18

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